Authors Healthy controls First trimester Second trimester Third trimester Statistics (P) Behne andWolters[19]* 88±11 89±1 83±10 74±12a <0.001 Mihailovia et al. [47]¶ 68 63 50a 51a <0.001 Anttila et al.[16]¶   59 63 51a <0.05 Zachara[14]¶ 55.4±10.9 53.4±8.0 42.3±9.4a 34.2±9.1a <0.001 Winnefeld et al.[48]¶   80.5±11.05 60.8±11.8a 56.1±11.8a <0.01

Table 1: Selenium concentration in plasma/serum in women during pregnancy with relatively low baseline selenium level. The primary data from Mihailoviac and Anttila could not be obtained; therefore interpretation of the results about concentration of Se is based on a graph in the publication. *, µg/kg plasma; ¶, µg/L plasma or serum; astatistically different from controls and/or 1st trimester of pregnancy